18070478 has 4 divisors (see below), whose sum is σ = 27105720. Its totient is φ = 9035238.

The previous prime is 18070477. The next prime is 18070483. The reversal of 18070478 is 87407081.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18070477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4517618 + ... + 4517621.

It is an arithmetic number, because the mean of its divisors is an integer number (6776430).

Almost surely, 2^18070478 is an apocalyptic number.

18070478 is a deficient number, since it is larger than the sum of its proper divisors (9035242).

18070478 is an equidigital number, since it uses as much as digits as its factorization.

18070478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9035241.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 18070478 is about 4250.9384846172. The cubic root of 18070478 is about 262.4157395470.

The spelling of 18070478 in words is "eighteen million, seventy thousand, four hundred seventy-eight".